Power-fan



(No Model.) I

P; MURRAY, r.

R POWER FAN.

No. 399,689 Patented Mar. 19, 1889 L J' T' f' J' .2 9 a a I r R wewi UNITED STATES PETER MURRAY, J R., OF NEWARK, NEW JERSEY.

POWER-'FAN.

SPECIFICATION forming part of Letters Patent No. 399,689, dated March 19, 1889.

Application filed November 22,1887- $erial No. 255,846. (No model.)

To aZZ whom-it may concern..-

Be it known that 1, PETER MURRAY, Jr., a citizen of the United States, residing at Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in POWGP-FEI-IIS, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates, generally, to that class of power-fans which are used for cooling and ventilating restaurants and other places. The invention relates particularly, however, to means for putting the fan into and out of operation as it is required. \Vhere these fans are employed for cooling and ventilating a room, and particularly if the room is of large size, so that a number of the fans are required, it is frequently desirable to stop or start one or more of the fans without stopping or starting the others. It is therefore desirable that each fan should be provided with means by which its movements can be controlled independently of the others. The present invention relates especially to a means for effecting this result.

In the accompanying drawings, Figure 1 is a sectional elevation of one form of the inven tion. Fig. 2 is a similar view showing the parts in a different position. Fig. 3 is a horizontal section taken on the line 3 of Fig. 1; and Fig. 4 is a view similar to Fig. 1, illustrating another form of the invention, which will be hereinafter explained.

Referring to said figures, it is to be understood that the fan proper is of the ordinary or substantially the ordinary form, consisting of two or more horizontally-arranged blades, which project radially from ahub, B, in which they are supported in sockets b in such manner as to be readily adjusted to different angles of inclination. The hub B is mounted to turn freely upon the lower end of a vertical shaft, O, which is supported in a suitable frame or hanger depending from the ceiling of the room. The shaft 0 is provided with a pulley, (not shown,) around which the belt for driving the fan passes. The hub B, as before stated, is mounted so as to turn freely upon the shaft 0, thereby permitting the shaft to be continuously driven without necessarily imparting motion to the hub and fanblades. The lower end of the shaft is pro vided with an enlargement or head, 0, between which and the lower end of the hub B is interposed a loose collar, a. The upper edge of the collar to is made flat to afford a flat bearing for the hub, and the lower edge of the collar and the upper edge of the head 0 are provided with coacting inclines d, which are so arranged that by turning the collar a the hub B can be raised and lowered on the shaft 0. The interior of the hub B is provided with a recess, 6, and the shaft 0, inside the hub, is provided with an inclined opening,

f, into which is dropped a loose pin, g, the re cess f being in such position when the hub is in its lowermost position that the end of the pin 9 will enter the recess 6 and clutch the hub to the shaft, as shown in Fig. 1.'

The operation of the device thus organized is as follows: The belt being upon the pulley on the shaft 0, so as to set the shaft in motion in the direction indicated by the arrow, it is only necessary in order to stop the fan to grasp and hold the collar a. The motion of the shaft 0 will then cause the inclines d upon the collar to ride up the inclines upon the head 0, thereby raising the hub B, so that the recess 6 will be above the end of the pin g, as shown in Fig. 2. The hub will then be unclutched from the shaft 0, and the resistance of the air upon the blades of the fan will prevent the latter from moving while the shaft continues to revolve idly. The bottoms of the inclines (1 upon the collar to will preferably be provided with small projections 2, which, when the hub is raised, will drop into corresponding recesses, 3, formed in the upper edges of the inclines upon the head 0, so as to catch the collar to and prevent it from being held so long as to carry its inclines d entirely over the inclines upon the head 0.

To start the fan the collar to will be grasped and held with suflicient force to carry the projections 2 out of the recesses 3 and the inclines (1 upon the collar past the inclines upon the head 0. As soon as this takes place, the collar a and the hub B will drop into the position shown in Fig. 1, and as the shaft 0 revolves the pin g will drop into the recess 6, and thus clutch the hub to the shaft and start the fan.

The construction which has just been described embodies the invention in what I regard as its best form; but it may be varied somewhat without departing from the essential feature of the invention. For example, as shown in Fig. 4, the recess 6 may be formed in the shaft 0, and the opening or recess f, for containing the pin g, in the hub. In this case the inclines upon the collar a and the head 0 will preferably be so arranged that the hub may be raised to start the fan and lowered to stop the fan, as also indicated in Fig. 4. The form and arrangement of the inclines d may also be varied from what is shown without departing from the essential features of the invention.

What I claim is- 1. In a power-fan, the combination, with the driven shaft 0 and the loosely-mounted vertically-moving hub B, for carrying the fanblades, of the freely-moving locking-pin g, for connecting and disconnecting the shaft and hub, substantially as described.

2. In a power-fan, the combination, with the shaft 0 and the loosely-mounted hub B, said shaft and hub being provided, one with the recess 6 and the other with the freely-moving locking-pin c, of the head 0 and loose collar at, having the coacting inclines d, for raising and lowering the hub, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

PETER MURRAY, JR.

Witnesses:

J. J. KENNEDY, T. H. PALMER. 

